Recitation 8

Posted on by Chengan Bai Uncategorized

Exercise1:

video:

code:

Arduino:

// IMA NYU Shanghai
// Interaction Lab
// For sending multiple values from Arduino to Processing


void setup() {
  Serial.begin(9600);
}

void loop() {
  // to send values to Processing assign the values you want to send
  //this is an example
  int sensor1 = analogRead(A0);
  int sensor2 = analogRead(A1);
  //int sensor3 = analogRead(A2);

  // send the values keeping this format
  Serial.print(sensor1);
  Serial.print(",");  // put comma between sensor values
  Serial.print(sensor2);
  //Serial.print(",");  // put comma between sensor values
  //Serial.print(sensor3);
  Serial.println(); // add linefeed after sending the last sensor value

  // too fast communication might cause some latency in Processing
  // this delay resolves the issue.
  delay(100);

  // end of example sending values
}

Processing:

  background(0);
}

void draw() {
  getSerialData();
  printArray(sensorValues);  
  x = map(sensorValues[0],0,1023,0,width);
  y = map(sensorValues[1],0,1023,0,width);

  stroke(255);
  line(sensorp[0], sensorp[1],x, y);
  sensorp[0]=int(x);
  sensorp[1]=int(y);
}

void setupSerial() {
  printArray(Serial.list());
  myPort = new Serial(this, Serial.list()[1], 9600);
  
  myPort.clear();
  myString = myPort.readStringUntil( 10 );  // 10 = '\n'  Linefeed in ASCII
  myString = null;

  sensorValues = new int[NUM_OF_VALUES_FROM_ARDUINO];
  
}
void getSerialData() {
  while (myPort.available() > 0) {
    myString = myPort.readStringUntil( 10 ); // 10 = '\n'  Linefeed in ASCII
    if (myString != null) {
      String[] serialInArray = split(trim(myString), ",");
      if (serialInArray.length == NUM_OF_VALUES_FROM_ARDUINO) {
        for (int i=0; i<serialInArray.length; i++) {
          sensorValues[i] = int(serialInArray[i]);
        }
      }
    }
  }
}

 

Exercise 2:

video:

 

 

Arduino:

#define NUM_OF_VALUES_FROM_PROCESSING 1 /** YOU MUST CHANGE THIS ACCORDING TO YOUR PROJECT **/
#include <Servo.h>
/** DO NOT REMOVE THESE **/
int tempValue = 0;
int valueIndex = 0;
bool prevState = false;
bool currentState = false;
Servo myservo;
int processing_values[NUM_OF_VALUES_FROM_PROCESSING];

void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  myservo.attach(11);
  }

void loop() {
getSerialData();
  currentState = processing_values[0];
  if (currentState != prevState && currentState == 1) {
    myservo.write(90);
    delay(100);
    myservo.write(0);
  } else {
    myservo.write(0);
  }
  prevState = currentState;
  }
  //receive serial data from Processing
 void getSerialData() {
  while (Serial.available()) {
    char c = Serial.read();
    switch (c) {
      case '0'...'9':
        tempValue = tempValue * 10 + c - '0';
        break;
      case ',':
        processing_values[valueIndex] = tempValue;
        tempValue = 0;
        valueIndex++;
        break;
      case '\n':
        processing_values[valueIndex] = tempValue;
        tempValue = 0;
        valueIndex = 0;
        break;
    }
  }
 }

processing:

import processing.serial.*;
float x;
float y;

int NUM_OF_VALUES_FROM_ARDUINO = 2;   /** YOU MUST CHANGE THIS ACCORDING TO YOUR PROJECT **/
int sensorValues[];      /** this array stores values from Arduino **/
int sensorp[];
String myString = null;
Serial myPort;

void setup() {
  size(500, 500);
  setupSerial();
  sensorp = new int[NUM_OF_VALUES_FROM_ARDUINO];
import processing.serial.*;
int NUM_OF_VALUES_FROM_PROCESSING = 1;  /** YOU MUST CHANGE THIS ACCORDING TO YOUR PROJECT **/int processing_values[] = new int[NUM_OF_VALUES_FROM_PROCESSING]; /** this array stores values you might want to send to Arduino **/
Serial myPort;
String myString;
int x=40;
int speedX = 7;

void setup() {
  fullScreen();
  background(0);
  setupSerial();
}
void draw() {
  background(0);
  circle (x, 200, 80);
  x= x+speedX;
  if (x > width-40 || x < 0+40) {
    speedX = -speedX;
  }
  if (x > width-40) {
    processing_values[0] = 1;
  } else {
    processing_values[0] = 0;
  }
  sendSerialData();
}
void setupSerial() {
  printArray(Serial.list());
  myPort = new Serial(this, Serial.list()[1], 9600);
  myPort.clear();
  myString = myPort.readStringUntil( 10 );  // 10 = '\n'  Linefeed in ASCII
  myString = null;
}
void sendSerialData() {
  String data = "";
  for (int i=0; i<processing_values.length; i++) {
    data += processing_values[i];
    //if i is less than the index number of the last element in the values array
    if (i < processing_values.length-1) {
      data += ","; // add splitter character "," between each values element
    }
    else {
      data += "\n"; // add the end of data character linefeed "\n"
    }
  }
  //write to Arduino
  myPort.write(data);
  print(data); // this prints to the console the values going to arduino
}

Homework:

video:

  

Arduino:

// IMA NYU Shanghai
// Interaction Lab
// For sending multiple values from Arduino to Processing

int buttonPin1 = 3;
int buttonPin2 = 4;

int counter1 = 0;
int counter2 = 0;

int buttonState1 = 0;
int buttonState2 = 0;

int prevState1 = 0;
int prevState2 = 0;


void setup() {
  Serial.begin(9600);
}

void loop() {
  // to send values to Processing assign the values you want to send
  //this is an example
  buttonState1 = digitalRead(buttonPin1);
  buttonState2 = digitalRead(buttonPin2);

  if (buttonState1 == 1) {
    if (buttonState1 != prevState1) {
      counter1 += 1;
    }
  }
  prevState1 = buttonState1;
  
  if (buttonState2 == 1) {
    if (buttonState2 != prevState2) {
      counter2 += 1;
    }
  }
  prevState2 = buttonState2;
  
  // send the values keeping this format
  Serial.print(counter1);
  Serial.print(",");  // put comma between sensor values
  Serial.print(counter2);
  //  Serial.print(",");  // put comma between sensor values
  //  Serial.print(sensor3);
  Serial.println(); // add linefeed after sending the last sensor value

  // too fast communication might cause some latency in Processing
  // this delay resolves the issue.
  delay(100);

  // end of example sending values
}

Processing:

// IMA NYU Shanghai
// Interaction Lab
// For receiving multiple values from Arduino to Processing

/*
 * Based on the readStringUntil() example by Tom Igoe
 * https://processing.org/reference/libraries/serial/Serial_readStringUntil_.html
 */

import processing.serial.*;


int NUM_OF_VALUES_FROM_ARDUINO = 2;   /** YOU MUST CHANGE THIS ACCORDING TO YOUR PROJECT **/
int sensorValues[];      /** this array stores values from Arduino **/

String myString = null;
Serial myPort;

void setup() {
  size(600, 600);
  background(0);
  setupSerial();
}

void draw() {
  background(0);
  getSerialData();
  printArray(sensorValues);

   if (sensorValues[0] % 2 == 1){
    pushMatrix();
    fill(255);
    translate(width*0.3, height*0.3);
    rotate(frameCount / 200.0);
    star(0, 0, 30, 70, 5);
    popMatrix();
  } else {
    fill(0);
  }

  if (sensorValues[1] % 2 == 1) {
    pushMatrix();
    fill(255);
    translate(width*0.7, height*0.7);
    rotate(frameCount / 200.0);
    star(0, 0, 80, 100, 40);
    popMatrix();
  } else {
    fill(0);
  }
  
}

void setupSerial() {
  //printArray(Serial.list());
  myPort = new Serial(this, Serial.list()[1], 9600);
  // WARNING!
  // You will definitely get an error here.
  // Change the PORT_INDEX to 0 and try running it again.
  // And then, check the list of the ports,
  // find the port "/dev/cu.usbmodem----" or "/dev/tty.usbmodem----"
  // and replace PORT_INDEX above with the index number of the port.

  myPort.clear();
  // Throw out the first reading,
  // in case we started reading in the middle of a string from the sender.
  myString = myPort.readStringUntil( 10 );  // 10 = '\n'  Linefeed in ASCII
  myString = null;

  sensorValues = new int[NUM_OF_VALUES_FROM_ARDUINO];
}


void getSerialData() {
  while (myPort.available() > 0) {
    myString = myPort.readStringUntil( 10 ); // 10 = '\n'  Linefeed in ASCII
    if (myString != null) {
      String[] serialInArray = split(trim(myString), ",");
      if (serialInArray.length == NUM_OF_VALUES_FROM_ARDUINO) {
        for (int i=0; i<serialInArray.length; i++) {
          sensorValues[i] = int(serialInArray[i]);
        }
      }
    }
  }
}
void star(float x, float y, float radius1, float radius2, int npoints) {
  float angle = TWO_PI / npoints;
  float halfAngle = angle/2.0;
  beginShape();
  for (float a = 0; a < TWO_PI; a += angle) {
    float sx = x + cos(a) * radius2;
    float sy = y + sin(a) * radius2;
    vertex(sx, sy);
    sx = x + cos(a+halfAngle) * radius1;
    sy = y + sin(a+halfAngle) * radius1;
    vertex(sx, sy);
  }
  endShape(CLOSE);
}

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